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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Open quantum system description of singlet-triplet qubits in quantum dots

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Castelano, L. K. ; Fanchini, F. F. ; Berrada, K.
Total Authors: 3
Document type: Journal article
Source: Physical Review B; v. 94, n. 23 DEC 23 2016.
Web of Science Citations: 5

We develop a theoretical model to describe the dissipative dynamics of singlet-triplet qubits in GaAs quantum dots. Using the concurrence experimentally obtained {[}Shulman et al., Science 336, 202 (2012)] as a guide, we assume that each logical qubit fluctuates under the action of a random telegraph noise (RTN) that simulates the 1/f(alpha) noise. We also study the dynamics of concurrence as a function of the amplitude of the RTN, the correlation time of the RTN, the preparation time of states, and the two-qubit coupling. Furthermore, we show that the two-qubit coupling together with the preparation time strongly affect the entanglement dissipative dynamics and both physical quantities can be employed to enhance the entanglement between singlet-triplet qubits. (AU)

FAPESP's process: 15/05581-7 - Quantum control in dissipative systems
Grantee:Felipe Fernandes Fanchini
Support type: Regular Research Grants
FAPESP's process: 12/13052-6 - Transport properties and quantum computation in nanostructures
Grantee:Leonardo Kleber Castelano
Support type: Regular Research Grants